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Building Mortars – MCQ

Posted on 15th December 202013th March 2022 By Malay Sautya

Building Mortars – MCQ

1. Building mortars are classified into 6 grades based on compressive strength

a) 4 grades
b) 6 grades
c) 7 grades
d) 9 grades

View Answer

d) 9 grades.

2. Lime mortars are the mixture of

a) Lime, cement, and water.
b) Cement, sand and water.
c) Hydraulic lime, sand, water.
d) Air hardening lime, sand and tarpin.

View Answer

c) Hydraulic lime, sand, water.

3. Gauged mortar are the mixture of

a) stone dust, sand, lime.
b) Lime, cement, sand.
c) Surkhi, lime, cement.
d) Sand, fly ash, cement.

View Answer

b) Lime, cement, sand.

4. After adding cement, the gauged mortar should be used within

a) 15 minutes.
b) 30 to 60 minutes.
c) 1 to 2 hours.
d) 3 to 6 hours.

View Answer

c) 1 to 2 hours.

5. Usually, lime mortar is made with

a) Pure lime.
b) Lean lime.
c) Hydraulic lime.
d) Air hardening lime.
e) Both (c) or (d).

View Answer

e) Both (c) or (d).

6. The principal demerit in using lime mortar is that it

a) Sets slowly.
b) Swells.
c) is uneconomical.
d) is not sound.

View Answer

a) Sets slowly.

7. Lime is added to cement mortar because of

a) To increase the setting time.
b) To increase the workability.
c) To make it economical.
d) All of these.

View Answer

b) To increase the workability.

8. In case of making dam-proofing mortars, which of the following type of cement are used

a) Ordinary Portland cement.
b) Rapid hardening cement.
c) Sulphate resisting Portland cement.
d) Low heat cement.

View Answer

c) Sulphate resisting portland cement.

9. Lime-cement mortar is also know as

a) Guarded mortar.
b) Gauged mortar.
c) Both (a) and (b).
d) Lime mortar.
e) None of these.

View Answer

c) Both (a) and (b).

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